Concrete insert.



I. KENNEDY.

CONCRETE INSERT.

APPLICATION FILED DEO.28, 911.

Patented N0v.26, 1912.

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vci'ete and other ceinentitious material, a.dapt.-'

ed to be fastened to the form or mold into which the concrete is poured, andthus become embedded in the material, so that the insert remains after the ,mold boards are removed, and

The objects of'the invention are to improve upon, simplify, and cheapeii the cost of manufacture of such concrete inserts, enable the insert to be suitably fastened or centered in position in the mold preparatory to p oiiring and provide means for securely being shown anchoring the device in the concrete.

Another object is to afford means for'centering a bolt adapted to cooperate with the insert and direct the readily engage the thread on the interior of the insert.

' Further objects of the invention will'hereand the invention is shown panyi-ng drawings,

in which- Figure 1 'is a perspective view is a longitudinal sectional View showing'the insert in position in a form or mold."

Iteferrmg .to the drawings, A represents an insert embodying the invention adapted cementitious material C. The insert comto be embedded in the B formed in the mold prises the shell D. preferably cylindrical as shown, and preferably closed at one end E, by forming the inclosing portion of the shell integral with serting a plug, indicated by the 'dotted lines. The shell I) may be cast. preferably in one piece otherwise suitably formed. and is interiorly threaded at F for a portion of its length, in this instance the threaded portion I substantially midway of the length of the bore in the single thicker main body portion, for convenience of illustration, the remaining thinner integral end or throat portions G and H of the bore being smooth and preferably of greater d1- Specification of Letters Patent.

forms a. socket or fastening. in the cbncrete for attaching various objects.

bolt so thatit will more of an insertembodying the invention; and Fig. 2

the body of the shell. or by in-.

ameter than the threaded walls of both the main body I 'r aitemeertev. as, 1912 a lication and December 28,1911. semi ire-ceased portion.- lEhe portion and end portions of theshell are preferably of substantially. uniform exterior diameter. It has been found that-a practical advantage is obtained in the construction of the device by leaving the frontport'ion G of the bore unthreaded, becaus the open throat so formed, which should be elongated and of substantial depth. as compared with the length of the central; threaded portion 01 the shell afiords means for centering a bolt as itis thrust into bolt so that it will more readily engage the thread F.

' Theblankbi idOOth space or spaces G and H in the shell'which are preferably of substantially -the saiiie'diameter, also afford certain' manufacturing advantages. It the insert is Inatle from a casting, core has 1a. "tendency-to blow h0les,.= and in tapping that portion which is to bethreaded, a.taper tap may go through said pprtiong without requiring a a second orbottomin.z=-tap to follow.

The exterior'of the shell Dis provided with anchoring projections which may be in the form of corrugations J which engage the insert, anddirects the the; enlarged make that portion of 4 the casting which istobe threaded free fromthe concrete and anchor the insert securely in place. Means are also provided on the exterior of the shell for centering and fastening the insert in. position in preparatory to pouringthe concrete. In this instance I hare .shown holdingflanges K and L preferably at the ends of the shell, and provided with apertures or notches O forming jaws for the reception. of suitable screws or nails P by means of which the in; sert is held with the open end against a mold board or other support. may be of any suitable shape, and the flanges L at the rear or closed end of the shell may be rectangular and there may be several flanges at this point, if desired. The flange K at the fro'ntor open end of'the shell is independent of the anchoring projections J and maybe rounded and preferably formed at an angle to the axis of the shell, in this instance said flange being 'bent upwardly away from the open terminates below the plane of the lowermost anchoring projection, so that the flange is out of contact with the mold and surface of the concrete wall, except at the base R of the-shell. The concrete may thus be tamped the mold,

The flanges .into the spaces between the flange and the.

. nails or screws out ofi' or bent backward, but

- flanges joint between the insert and the mold owing cause of the amount of ceinentitious material I in front of and surrounding said flanges.

mold and cover the flange, so that after the mold boards are removed and the tips of the a very smallportion of the flange Will show, in fact, practically nothing but the ring surrounding the hole which was in contact with the mold. This construction has the further advantage of more nearly insuring a tight I claim and desire to Patent-the following: I A concrete insert comprising a holloa cyobtain- Letters lindrical shell or casing having a single the threaded portion, the

thicker main central body portion and thinner end or throat portions, one end heingf closed, the open endot the shell being (c-[p11 mitigate ed to bear flush against a mold board or other support, the 'Walls of. both the mainbody portion. and the end portions being of substantially cumferent-ial exterior of the shell, the central body portion of the shell having a single interior threaded area to receive a fastening device,

uniform exterior diameter, ciranchoring projections on the the end or throat portions of the shell being formed integral with the central-body portion and having smooth cylindrical bores of substantially the same interior diameter, but each of larger interior diameter than that of smooth bored end portion at the open end of the shell being elongated and of substantial depth as compared with the len th of the central threaded portion of the sii ell and forming a smooth throat for guiding the fastening device into the said threaded portion, and means independent of theinterioi. threaded portion of the shell for securing the insert'in position against said mold board or other support.

In testimony whereof have signed this specification in the presence oft-We snhscrih ing witnesses.

. JOSEPH KENNEDY. *itnesses M. Krirri-z, I. B. MOORE. 

